Unfortunately the post doesn’t really help much in terms of finding out which combinations trigger the bug, so I tried out some of the combinations myself found that using any traffic source dimension with these metrics will trigger the bug:

entrances

exits

exit %

If you are aware of other metrics that trigger this bug, please let me know and I’ll add them to the list.

I should add that this bug also affects custom reports!

If you’re using any traffic source dimension and adCost together with any of the above metrics in a custom report you’ll get zero for the adCost data.